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Please describe your changes

I have added the ability to create tags for a board from the 'Edit Tags' modal, which is useful as it allows users to setup the tags they want for their board without going into a specific card.

fixes #957

Testing Evidence

AI Translation disclosure

Note that I used AI for generating translations, with the following prompt:

I have the test "Add tag..." which is about creating a new tag. It will be used on a modal with that set as the placeholder text and it should be clear to the user that when they type in the box and press enter, then a new tag will be created with the name of the element that they entered. Use standard translations used by websites for the similar function.

I've tried to verify these changes by using google to find examples of other websites add buttons to make sure there are examples of the same language being used in real sites, but since I don't speak the languages I can't verify them fully.

If it is preferred that no translations be provided for these words, I can replace them with English variants instead.

German: Found an image of a website with a button that used the same text.
English: My native language
Spanish: Verified by a native spanish speaker
French: Found an image of a website with a button that used the same text.
Japanese: Found an image of a website with a button that used the same text.
Brazilian: Found an image of a website with a button that used the same text.
Russian: I can't reliably verify this since the language is too different form english. Every example I could find had a totally different way of writing this.
Thai: Same as above, I can't read the characters well enough to reliably verify the phrase.
Turkish: Found an image of a website with a button that used the same text.
Ukrainian: I can't reliably verify this since the language is too different form english.
Chinese: Found an image of a website with a button that used the same text.